VideoCardz.com posted ASRock confirms X299 and X399 motherboards
A quote from the article:
Before you ask, there are pictures. What we have are entries from ASRock website, which already list four X299 motherboards:ASRock confirms X299 and X399 motherboards @ VideoCardz
X299 Fatal1ty Professional Gaming i9
X299 Fatal1ty Professional Gaming i7
X299 Gaming K6
X299 Taichi